The current-induced spin-orbit torque(SOT) is one of the most promising ways for high speed and low power spintronics devices. However, the mechanism of SOT driven magnetization reversal, especially the role of the fi...The current-induced spin-orbit torque(SOT) is one of the most promising ways for high speed and low power spintronics devices. However, the mechanism of SOT driven magnetization reversal, especially the role of the field-like torque(FLT), is still unclear. Here, we report the observed promotion and suppression of switching by FLT, which depends on the relative direction of FLT and spin polarization. Our results reveal that the FLT could modulate the switching speed and power consumption by affecting the work done by the damping-like torque, and leads two different reversal dynamical paths during the switching.Furthermore, the origin of incubation time in SOT induced switching is clarified simultaneously.展开更多
为了研究桥墩结构的震后功能可恢复性,针对附加自复位耗能支撑(self-centering energy dissipation braces,SCEB)双柱式桥墩结构进行基于增量动力分析方法的地震易损性分析,采用最大侧移率和残余侧移率作为性能指标,系统探讨其在近场脉...为了研究桥墩结构的震后功能可恢复性,针对附加自复位耗能支撑(self-centering energy dissipation braces,SCEB)双柱式桥墩结构进行基于增量动力分析方法的地震易损性分析,采用最大侧移率和残余侧移率作为性能指标,系统探讨其在近场脉冲型地震动作用下的失效概率.为了对比分析,同时选取60条远场无脉冲型地震动记录对附加SCEB桥墩结构进行了易损性分析.结果表明:在小震作用下,SCEB仅为桥墩结构提供刚度和承载力,在大震作用下还可提供耗能能力,同时可以提供良好的自复位能力;附加SCEB可有效降低桥墩结构在近场脉冲型地震动作用下的失效概率(最大侧移率和残余侧移率),特别是残余侧移率;附加SCEB桥墩结构在近场脉冲型地震动作用下的失效概率大于远场无脉冲型地震动作用下的失效概率.自复位耗能支撑可有效减小桥墩结构的失效概率,提高桥墩结构的抗震性能.展开更多
基金supported by the National Key Research and Development Program of China (Grant Nos. 2021YFB3601303, and 2021YFB3601300)the National Natural Science Foundation of China (Grant Nos. 92164206, 61904009, and 62001014) for their financial support of this work。
文摘The current-induced spin-orbit torque(SOT) is one of the most promising ways for high speed and low power spintronics devices. However, the mechanism of SOT driven magnetization reversal, especially the role of the field-like torque(FLT), is still unclear. Here, we report the observed promotion and suppression of switching by FLT, which depends on the relative direction of FLT and spin polarization. Our results reveal that the FLT could modulate the switching speed and power consumption by affecting the work done by the damping-like torque, and leads two different reversal dynamical paths during the switching.Furthermore, the origin of incubation time in SOT induced switching is clarified simultaneously.
文摘为了研究桥墩结构的震后功能可恢复性,针对附加自复位耗能支撑(self-centering energy dissipation braces,SCEB)双柱式桥墩结构进行基于增量动力分析方法的地震易损性分析,采用最大侧移率和残余侧移率作为性能指标,系统探讨其在近场脉冲型地震动作用下的失效概率.为了对比分析,同时选取60条远场无脉冲型地震动记录对附加SCEB桥墩结构进行了易损性分析.结果表明:在小震作用下,SCEB仅为桥墩结构提供刚度和承载力,在大震作用下还可提供耗能能力,同时可以提供良好的自复位能力;附加SCEB可有效降低桥墩结构在近场脉冲型地震动作用下的失效概率(最大侧移率和残余侧移率),特别是残余侧移率;附加SCEB桥墩结构在近场脉冲型地震动作用下的失效概率大于远场无脉冲型地震动作用下的失效概率.自复位耗能支撑可有效减小桥墩结构的失效概率,提高桥墩结构的抗震性能.
基金Supported by National Nature Science Foundation of China(No.60477003)Science and Technology Committee of Shanghai(No.0552nm006,No.0652nm033)+3 种基金Project of Key Laboratory of Advanced Display and System Applications(Shanghai University) Ministry of Education,China(No.P200503)Shanghai Pujiang Program(No.05PJ14320)Key Project of Photonic Technology(No.06DZ11404)Development Program of High Technology and Innovation of Shanghai Economic Committee Key Project of Expro Panel(No.05dz05803)